Valve lifter



1,629,708 May 24 1927- F. c. JEWELL E AL VALVE LIFTER Filed May 4, 1925 2 sheets-size 1 IE 13 T I I VEE'. III-HS raZerickC .Tewell enry 5 Jewell F. c. JEWELL ET AL May 24 VALVE LI FTER Filed May 4, 1925 2 sheets-sheet 2 VE cu 5. Fred Prick C Jewell Patented May 24, 1927.

UNITED STAlIlES PATENT OFFICE.

FREDERICK C. JEWELL AND HENRY S. JEWELL, OF CHICAGO, ILLINOIS.

VALVE LIFTER.

Application filed May 4, 1925. Serial No. 27,717.

This invention relates to valve lifters and has for its object the provision of a valve lifter which is simple and which may be conveniently operated,

It is further an object of this invention to provide a valve lifter which is rugged and which may be economically manufactured.

It is also an object of this invention to provide a valve lift-er in which the jaws will be automatically held in open position without necessitating any additional etfort on the part of the operator other than that necessary to open the jaws to such position.

Other and further important objects of this invention will be apparent from the disclosures in the specification and accompanying drawings.

The invention (in a preferred form) is illustrated on the drawings and hereinafter more fully descril'ied.

()n the drawings:

Figure 1 is a plan view of a device embodying this invention.

Figure 2 is a longitudinal section with arts in elevation on the line Il-Il of *igure 1:

Figure 3 is a section on the line TIL-III of Figure 2.

Figure 4 is a fragmentary detail longi tudinal section of a modified form of this invention.

Figure 5 is a sectional view on the line V-V of Figure 4.

Figure 6 is a fragmentary detail longitudinal section of another modified form of this view.

Figure 7 is a sectional view on the line VII-VIT of Figure 6.

Figure 8 is a view of the device of Figure 6 showing the same in partly opened posi tion.

Figure 9 is a fragmentary detail longi tudinal section of still another modified form of this invention.

Figure 10 is a view of the device of Figure 9 showing the same in open position.

As shown on the drawings:

Referring to Figures 1 and 2. there is shown a valve lifter having a pair of movable arms pivotall v secured together ntermediate their length by means of a pin extending through the hinges 4 and 5 integral with the arms 1 and 2 respectively. IntegraFwith each of the arms 1 and 2 is a pair of spaced jaw members 6 and 7.

The jaws (i and 7 of the arm 2 are adapted to surround the tappet rod (not shown) and bear upon its guide as an abutment while the jaws (i and 7 of the arm 1 are adapted to likewise surround the tappet rod and bear against the base of the valve spring (not shown). The arms 1 and 2 n'iay then be pressed together for forcing the jaw ends of the respective arms farther apart for compressing the spring "for removal of the cotter pin or fastening so that the spring may be readily removed and the valve lifted.

ln order to hold the jaw ends of the arms 1 and 2 apart while the cotter pin is being removed. there is provided a dog member 8 pivoted at the point 9 and having a lower cam surface 10 which is adapted to move downwardly by gravity as the ends are moved to open posit ion until said surface to is engaged by the lower arm 2. When the device is in open position. the dog 8 will thus prevent its returning to closed position until dog 8 is thrown back into the position shown in Figure 2. A lever 11 is provided integral with the dog 8 for facilitating throwing the latter into position for releasing arms 1 and 2 from open position.

In the modification shown in Figures at and 5. there is added a member 12 which has provided thereon a lever 13 and a cam surface 14. The cam member 12 is adapted to also move downwardly by gravity as the jaw ends of the arms 1 and 2 are opened and it will be noticed by referring to Figure 4 that the cam surface 14. of said member is such that it. will coact with the dog 8 for aiding the latter in resisting any closure of the arms even when said arms have not yet reached their extreme open position.

In the modilication shown in Figures 6, 7 and 8. there is provided. in lieu of the dog 8, a dog 15 which has integral therewith an arm 16 in addition to a releasing arm or lever 17. The dog 15 has also provided atits lower end a pair of rounded extensions 18 and 19 which are adapted to engage a cam surface 20 of a member 21 for insuring that the initial opening of the device will he supported by means of the dog 15 against closure in case the pressure on the arms 1 and :3 is released before the device has reached the extreme open position. The function of the arm 16 and the extensions 18 and 19 is to distribute the pressure exerted by the lower end of the dog 15 to in sure against slipping.

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1n the modification shown in Figures 9 and 10. there is provided. in addition to the dog 8 of Figures 1 and 2, a spring 22 which is secured around the pivot pin 3 and adapted to engage between the lower arm 2 and said dog t for pressing the latter into open position. Thus in the position shown in Figure 10. the spring 213 will act in addition to gravity to cause the dog 8 to take open position when the device is opened. If. however. the device is held upside down. the spring 22 will still be suflieient to force the dog 8 into open position as the jaw ends of the arms 1 and 2 are opened.

A spring similar to the spring 22 described above in connection with Figures 9 and 10 may be provided in connection with the modifications shown in Figures 4. 5. (3. T and 8 SO as to make the dogs therein normal ly spring-pressed toward open position.

It will be obvious that by using this simple device. the valve litter will ttlltfil'llfltltttll v be held in open position without causing the operator to make any other movement than that required to compress the arms 1 and 2. It will further be evident that this device is rugged, simple and convenient of operation. It will also be #0011 that it may be easily and economically constructedv We are aware that numerous details of construction may be varied through a wide range without departing from the prineb ples of this invention. and we therefore do not purpose limiting the patent. granted. otherwise than necessitated by the prior art.

e claim as our invention:

1. A valve lifting tool comprising a pair of members pivoted to one another intermediate their ends and having handles adapting the same to he manually operated to open position. and a dog pivoted to one of said members and engageable by gravity at its opposite end with the other oi said members when the members are operated to open position. to hold said members in such position. sail members being shaped to receive and house the opposite ends of the dog whereby to guide and protect the same in its movements.

2. A device of the class described comprising a pair of pivoted members adapted to be manually operated to open position. a dog member pivoted to one of said members and having a cam surface thereon adapted to be moved by gravity to engage with the other oi said members when the same is operated to open position l'or holding said members in open position, and a second member having a cam surFace enacting with said dog for preventing the disconnection of said dog from said other nieml'ier.

3. A device of the class described comprising a pair of pivoted members adapted to be manually operated to open position. a dog member pivoted to one of said members adapted to be moved by gravity to engage the other of said members when the same is operated to open position for holding said members in open position. and an additional member disposed between said pivoted members for insuring connection between said dog member and said other of said pivoted members.

4. A device of the class described comprising a pair oi, pivoted members adapted to be manually operated to open position. a dog member pivoted to one ot'v said members and having a plurality of extensions thereon adapted to automatically engage with the other of said members when the same is operated to open position for holding said member in open position.

A device of the class described comprising a pair ot pivoted members adapted to be manually operated to open position. a dog member pivoted to one of said members and having a plurality of extensions thereon adapted to automatically engage with the other of said members when the same is 01)- crated to open position for holding said member in open position. and means for insuring the engagement oi said extensions with the other of said members.

6. A device. of the class described comprising a pair of pivoted members adapted to be manually operated to open position. a dog member pivoted to one of said members and having a cam surl'ace thereon adapted to engage by gravity with the other of said members when the same is operated to open position for holding said member in open position. and means tor insuring the engagement of said dog member with the other of said members.

In testimony whereof. we have hereunto subscribed our names.

FEEDER IUK t. JPHVELL. HENRY S. JEWELL. 

